NullPointerException On Android.os.Bundle

Question

I have some problem with my code, when I need to transfer some data from one Activity to another one. First Activity (ViewCashflow) a

Answer 1

This is happen because when you start your second activity NewTransaction directly you don't put extras in the intent, so when you call getIntent().getExtras(); it returns a null object and this is why getIntent().getExtras().getBoolean("update"); throw the NPE.

As solution: try to check if getIntent().getExtras() != null before getting the data, this will fix your problem.

Bundle bundle= getIntent().getExtras();
    if (bundle!= null) {// to avoid the NullPointerException
        isUpdate=bundle.getBoolean("update");
        if(isUpdate)
        {
           id=bundle.getString("TransId");
           transname=bundle.getString("TransName");
           transamount=bundle.getString("TransAmount");
           transtype=bundle.getString("TransType");
           transdate=bundle.getString("CategDate");
           transcategid=bundle.getString("CategCategId");
           txtCashflow.setText(transname);
           txtType.setText(transtype);
           txtAmount.setText(transamount);
       }
    }